remove unused url dependency (#44)

Co-authored-by: Thomas Hu <thomasrockhu@users.noreply.github.com>

Author: timoschilling

codecov.gemspec

@@ -14,9 +14,8 @@ Gem::Specification.new do |s|
   s.test_files         = ['test/test_codecov.rb']
   s.require_paths      = ['lib']
 
-  s.add_dependency 'json'
-  s.add_dependency 'simplecov'
-  s.add_dependency 'url'
+  s.add_dependency "json"
+  s.add_dependency "simplecov"
 
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'mocha'